63440618407 has 2 divisors, whose sum is σ = 63440618408. Its totient is φ = 63440618406.

The previous prime is 63440618387. The next prime is 63440618413. The reversal of 63440618407 is 70481604436.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 63440618407 - 2¹¹ = 63440616359 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (63440618447) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 31720309203 + 31720309204.

It is an arithmetic number, because the mean of its divisors is an integer number (31720309204).

Almost surely, 2^63440618407 is an apocalyptic number.

63440618407 is a deficient number, since it is larger than the sum of its proper divisors (1).

63440618407 is an equidigital number, since it uses as much as digits as its factorization.

63440618407 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 387072, while the sum is 43.

The spelling of 63440618407 in words is "sixty-three billion, four hundred forty million, six hundred eighteen thousand, four hundred seven".